Local privilege escalation via uncleared packet metadata
Published Jun 28, 2023 · Updated Mar 5, 2025
Heap out-of-bounds write in the Linux Kernel ipvlan driver before 6.4 allows local users to escalate privileges through IPv4 traffic. ipvlan_process_v4_outbound reuses skb->cb without clearing it before __icmp_send and __ip_options_echo interpret stale option metadata, enabling an out-of-bounds write. Reachability requires CONFIG_IPVLAN and an ipvlan L3 packet path; successful exploitation grants elevated execution, while failed attempts can crash the system.
Summary
What happened
Heap out-of-bounds write in the Linux Kernel ipvlan driver before 6.4 allows local users to escalate privileges through IPv4 traffic. ipvlan_process_v4_outbound reuses skb->cb without clearing it before __icmp_send and __ip_options_echo interpret stale option metadata, enabling an out-of-bounds write. Reachability requires CONFIG_IPVLAN and an ipvlan L3 packet path; successful exploitation grants elevated execution, while failed attempts can crash the system.
The record
- CVE
- CVE-2023-3090
- Published
- Jun 28, 2023
- Updated
- Mar 5, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-787, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 28, 2023CVE publishedPublication date reported by the CVE source.
- Mar 5, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=3.19 <6.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- openEuler ipvlan KASAN reproducerproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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